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RISS 인기검색어
- 검색키워드
- 저자 : Yuji NISHIO (검색결과 3 건)
- 무료
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Biometric Identity Verification Using Intra-Body Propagation Signal
Yasuhiro YORIKANE,Yuji NISHIO,Isao NAKANISHI,Yoshio ITOH,Yutaka FUKUI 대한전자공학회 2007 ITC-CSCC :International Technical Conference on Ci Vol.2007 No.7
We propose to utilize an electromagnetic wave through a human body as biometrics. The electromagnetic wave (intra-body propagation signal) is generated at a relatively shallow depth in the human body through a pair of electrodes pasted on the human skin. The transfer characteristic of the intra-body propagation signal in each individual human being is different from those of others because human tissue characteristics vary widely. By using such a difference, it is expected to authenticate personal identification. In addition, liveness detection can be realized using the intra-body propagation signal. It is effective on preventing the disguise using artificial bodies. In this paper, we examined the individual feature in the intra-body propagation signal based on the spectrum analysis. We obtained a verification rate of 58% using the similarity in power spectrum especially in the 30-60 ㎒ sub-band.
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Asami Usui,Gentaro Ishiyama,Akihiko Nishio,Maiko Kawamura,Yukiko Kono,Yuji Ishiyama 대한대장항문학회 2021 Annals of Coloproctolgy Vol.37 No.3
Purpose: Surgery of the horseshoe fistula is challenging due to its complex configuration and sphincter muscle involve- ment. Complete deroofing fistulotomy for horseshoe fistula is highly curative with the eradication of all fistulous lesions but has been discredited for its high incontinence rate. It was replaced with the more conservative Hanley’s procedure leaving the lateral tracts intact, despite its issue of recurrence. Our study aimed to report the outcomes of a procedure di- viding complete deroofing fistulotomy for horseshoe fistula into 2 stages to avoid impairment of sphincter function. Methods: We retrospectively reviewed 139 patients who underwent surgery for horseshoe fistula using the 2-stage com- plete deroofing fistulotomy method between 2014 and 2017. The first surgery deroofed the lateral tracts with an arch-like incision severing the anococcygeal ligament. The primary lesion was also drained and curetted. A seton was placed in the primary tract which was laid open in the second surgery after the lateral wound had partially healed. Results: Recurrence was observed in 12 patients. All were superficial recurrences except for 1, in which recurrence was confirmed in the primary lesion. Those with blind intersphincteric upward extensions had a significantly higher recurrence rate. Furthermore, patients who resided far from the hospital and could not make visits for frequent wound inspections also had a significantly higher recurrence rate. No patient had any continence issues at the end of the follow-up period. Conclusion: Managing horseshoe fistula with the 2-stage deroofing fistulotomy approach allows for eradication of the fis- tula tract without compromising anal sphincter function.
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Conditional PTEN-deficient Mice as a Prostate Cancer Chemoprevention Model
Koike, Hiroyuki,Nozawa, Masahiro,De Velasco, Marco A,Kura, Yurie,Ando, Naomi,Fukushima, Emiko,Yamamoto, Yutaka,Hatanaka, Yuji,Yoshikawa, Kazuhiro,Nishio, Kazuto,Uemura, Hirotsugu Asian Pacific Journal of Cancer Prevention 2015 Asian Pacific journal of cancer prevention Vol.16 No.5
Background: We generated a mouse model of prostate cancer based on the adult-prostate-specific inactivation of phosphatase and tensin homolog (PTEN) using the Cre-loxP system. The potential of our mice as a useful animal model was examined by evaluating the chemopreventive efficacy of the anti-androgen, chlormadinone acetate (CMA). Materials and Methods: Six-week-old mice were treated subcutaneously with $50{\mu}g/g$ of CMA three times a week for 9 or 14 weeks and sacrificed at weeks 15 and 20. Macroscopic change of the entire genitourinary tract (GUT) and histologically evident prostate gland tumor development were evaluated. Proliferation and apoptosis status in the prostate were examined by immunohistochemistry. Results: CMA triggered significant shrinkage of not only the GUT but also prostate glands at 15 weeks compared to the control (p=0.017 and p=0.010, respectively), and the trend became more marked after a further five-weeks of treatment. The onset of prostate adenocarcinoma was not prevented but the proliferation of cancer cells was inhibited by CMA, which suggested the androgen axis is critical for cancer growth in these mice. Conclusions: Conditional PTEN-deficient mice are useful as a preclinical model for chemoprevention studies and serve as a valuable tool for the future screening of potential chemopreventive agents.
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